CC 2853: "Victory over the 'prince of this world' [Jn 14:30] was won once for all at the Hour when Jesus freely gave himself up to death to give us his life. This is the judgment of this world, and the prince of this world is 'cast out.'[Jn 12:31; Rev 12:10.] 'He pursued the woman' [Rev 12:13-16.] but had no hold on her: the new Eve, 'full of grace' of the Holy Spirit, is preserved from sin and the corruption of death (the Immaculate Conception and the Assumption of the Most Holy Mother of God, Mary, ever virgin). 'Then the dragon was angry with the woman, and went off to make war on the rest of her offspring.' [Rev 12:17.] Therefore the Spirit and the Church pray: 'Come, Lord Jesus,' [Rev 22:17,20.] since his coming will deliver us from the Evil One."
YET here it is written in Romans
Romans 3 New International Version (NIV)
(20) Therefore no one will be declared righteous in God’s sight by the works of the law; rather, through the law we become conscious of our sin.
Righteousness Through Faith
(21) But now apart from the law the righteousness of God has been made known, to which the Law and the Prophets testify. 22 This righteousness is given through faith in[h] Jesus Christ to all who believe. There is no difference between Jew and Gentile, 23 for all have sinned and fall short of the glory of God,
24 and all are justified freely by his grace through the redemption that came by Christ Jesus.
23 For all have sinned, and come short of the glory of God;
24 Being justified freely by his grace through the redemption that is in Christ Jesus: (KJV)
It does NOT say: "For all EXCEPT MOTHER MARY and come short of the glory of God."
—For all have sinned, and come short of the glory of God;—
Do toddlers sin? The mentally handicapped?
We often use the word “all” without meaning each and every one, as the sacred author is probably doing here.
****(20) Therefore no one will be declared righteous in God’s sight by the works of the law; rather, through the law we become conscious of our sin.****
No one has ever claimed that Mary’s Immaculate Conception was accomplished by the works of the law.
The truth of the teaching of the Church is evident in that part of the statement which you have chosen NOT to highlight.
****by a singular grace and privilege of almighty God and by virtue of the merits of Jesus Christ, Savior of the human race, ****
Mary is indeed saved and preserved from sin by the same Grace by which we are all saved, through the same merits of Jesus the Christ by which we are all redeemed.
If you are going to try to use the CCC against the Church’s teachings, at least try to thoroughly read and understand it first.
Jesus is Mary’s Savior, just as He is for all who believe in Him.